KEYWORDS: Computer graphics, Profilometers, Image resolution, Data processing, Denoising, Error analysis, 3D image processing, 3D displays, Optical spheres, 3D scanning
Often, the 3-D raw data coming from an optical profilometer contains spiky noises and irregular grid, which make it
difficult to analyze and difficult to store because of the enormously large size. This paper is to address these two issues for
an optical profilometer by substantially reducing the spiky noise of the 3-D raw data from an optical profilometer, and by
rapidly re-sampling the raw data into regular grids at any pixel size and any orientation with advanced computer graphics
tools. Experimental results will be presented to demonstrate the effectiveness of the proposed approach.
An optical profilometer has been used to obtain 3-dimensional data for use in two research projects
concerning toolmark quantification and identification. In the first study quantitative comparisons
between toolmarks made using data from the optical system proved superior to similar data obtained
using a stylus profilometer. In the second study the ability of the instrument to obtain accurate data
from two surfaces intersecting at a high angle (approximately 90 degrees) is demonstrated by
obtaining measurements from the tip of a flat screwdriver. The data obtained was used to produce a
computer generated "virtual tool," which was then employed to create "virtual tool marks." How
these experiments were conducted and the results obtained will be presented and discussed.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.